How to Find The Best Plastic Injection Molding Companies

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Selecting the best plastic injection molding company is important to your project's bottom line. While it may take some time and considerable research, the results are worth the time and energy. Weigh factors such as location, experience and company specialties to find the right supplier for you.

Identify and be certain about the piece or product you need molded. Specifically, you will need to have a fully defined 3D Model and engineering drawing of the plastic component. Be sure to fully specify draft angles and surface textures in your drawing. Also specify things like maximum allowable flash.

Obtain estimates. Going overseas to places like China or Korea usually results in a lower costs per piece than keeping production in the United States. However, this savings can be offset by delays in getting the product to market. Weigh the production costs versus shipping costs and determine your total budget.

Learn about the history of the company and its capabilities. Find out how long it has been in business and for what industries it typically mold parts. If you have a part that requires extremely tight tolerances, an injection molding company in the health or aeronautics industry may work out better than a company that molds toys.

Determine the type of molding capabilities the company has. Does it have any specialties such as two-shot molding or insert molding? Be comfortable that a company is able to handle the volume you require. Take some time to understand how the plastic injection molding company monitors and ensures quality. Does it do control charting? What is its certification? Ask to see examples of quality records and documentation for recent projects.

Weigh the location. Having an injection molding supplier nearby can allow you to make day trips to the supplier when issues arise. Weigh this against any savings you can get by using a supplier in another country.

Tips & Warnings

  • Remember that low quoted cost does not always equal lower overall cost. It certainly does not indicate quality
  • Be very clear upfront with your needs, including the quality you expect and annual volumes you require.
  • Consider a wide variety of plastic molding companies, both cheap and expensive, near and far, in order to get a very good feel for what is out there.

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